feat(pricing): add Claude Opus 4.7 with adaptive thinking and Bedrock SKU

- Seed claude-opus-4-7 pricing (same tier as 4.6: $5 / $25 / $0.50 /
  $6.25 per million tokens). Relies on incremental INSERT OR IGNORE
  seeding; no SCHEMA_VERSION bump needed.
- Whitelist opus-4-7 in thinking optimizer so it uses adaptive
  thinking + max effort + 1M context beta, matching 4.6 behavior.
- Bump default OPUS model in PIPELLM and AWS Bedrock (AKSK / API Key)
  presets to 4.7. Bedrock SKU drops the -v1 suffix per the official
  4.7 model card (anthropic.claude-opus-4-7 and
  global.anthropic.claude-opus-4-7).

src-tauri/src/database/schema.rs

@@ -1203,6 +1203,15 @@ impl Database {
     /// 注意: model_id 使用短横线格式（如 claude-haiku-4-5），与 API 返回的模型名称标准化后一致
     fn seed_model_pricing(conn: &Connection) -> Result<(), AppError> {
         let pricing_data = [
+            // Claude 4.7 系列
+            (
+                "claude-opus-4-7",
+                "Claude Opus 4.7",
+                "5",
+                "25",
+                "0.50",
+                "6.25",
+            ),
             // Claude 4.6 系列
             (
                 "claude-opus-4-6-20260206",